Phonograph



F. S. VALLADAO.

PHONOGRAPH Jan. 2, .1923.

FILED FEB. 2|. 1922.

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A TTORNEYS.

Patented Jan. Z, 1923;

FREDERICK S. VALLADAO, OF SAN FRANCISCO, CALIFORNIA.

PHONOGRAPH.

Application filed February 21, 1922. Serial No. 538,420.

To all w 71. mm it may concern lie it known that I, FREDERICK S. VAL-mnAo, a citizen of the United States, residing at San Francisco, in thecounty of San Francisco and State of California, have invented new anduseful Improvements in Phonographs, of which the following is aspecification.

T his invention relates to phonographs and has particular reference toan improved phonograph construction whereby the sound is intensified,the vibration is ii'icreased and the metallic tone is reduced to aminimum.

A further object of this invention is to equip a phonograph ofconventional construction with my improved means without materiallyaltering the construction of the machine. I

Another object of this invention is to improve a phonograph by theapplication of means which are simple in construction economical tomanufacture and highly serviceable.

Other objects and advantages will be apparent during the course of thefollowing description.

In the accompanying drawings forming a part of this specification, andin which like numerals are employed to designate like parts throughoutthe same,

Fig. 1 is a longitudinal vertical section on the line 1-1 of Figure 2,

Fig. 2 is a cross section on the line 22 of Fig. 1,

Fig. 3 is a. front elevation of a supporting frame having my soundintensifying means applied thereto,

F ig. 41 is a transverse vertical section on the line 41---4: of Figure3, and

Fig. 5 is a horizontal section on the line 5 5 of Fig. .1.

1n the accompanying drawings wherein for the l'uirpose of illustration.is shown a. preferred embodin'ient of my in \"cution the numeral 6(lesignates a phonograph box equipped with a housing 7 containing themotor and the other operating mechanism of a phonograph capable ofturning a turntable 8 mounted on the top of the box 6. Adapted tosupport the tone arm 9 is a bracket 10 provided with an annular flange11. This flange is preferably secured to the rear wall 12 of the box byfastening elements 13.

Interposed between the flange 11 and the rear wall 12 of the box I haveprovided felt strips designated by the numeral 13 which in turn havepositioned therehetween mica strips 1.1 preferably two in number,between which the sound waves coming through the tone arm 9 are adaptedto pass and be vibrated thereby.

The numeral 15 designates the goose neck of the phonograph which isequipped with an annular flange 16 secured to the inner surface of therear wall 12 of the box by fastening elements 16. Between the flange 16and the wall 12 I propose to position additional felt pieces.

, Between the front end of the goose neck 15 and the sound dividingvbaffles 17 there are disposed connected frames 18 preferably made offelt material. These frames have positioned therebetween a plurality ofvertically disposed spaced mica strips 19 of substantial width. Thestrips being retained in position between the frames by a plurality offastening elements. As shown to advantage in Figures 1 and 1, the framesare connected to the upper and lower baffles and the strips of mica arethen most conveniently disposed in the path of the sound Waves for readyvibration. By insulating the mica strips from metal or wood it will beobvious that the sound waves will be intensified, the vibrationincreased and the metallic tone, so annoying in phonographs will bereduced to a minimum.

In practise I have ap lied these mica strips and their associated feltframes to phonographs and have obtained clarity of sound and the abovementioned features described.

From the foregoing description taken in connection with the accompanyingdrawing it will, be evident that l: have improved the constructimi ofphonogralflis so that the means for accomplishing the desired result canbe applied thereto without materially altering the construction of anyphonograph and can also be applied in a minimum amount of time andwithout any great outlay of expense on the part of the user.

It is to be understood that the form of my invention herewith shown anddescribed is to be taken as a preferred example of the same, and thatvarious changes in the shape, size and arrangement of parts may beresorted in wiibrmt 1"!e ';:':.u:tiug fiicnu the spirit oi? theinvention 01' the scope of the subjoined claim.

Having thus described my invention, 1 c1ain1:

In a device 01 the character described, the combination with aphonograph cabinet, a

tone l'ufacket adapted to be cxtericwly secured to said cabinet, cushionmeans secured between said bracket and said, cabinet, and 10 spaced micastrips secured to said cushion means.

In testimony whereof I aflix my signature.

FREDERICK s. VALLADAO.

